For the non-holographic models, we can use s-wave approximation to study the black holes in higher dimensions. In s-wave approximation, we ignore the angular part of the metric and we are left with two dimensional CFT metric. Therefore we can calculate the entanglement entropy of Hawking radiation from 2D CFT formula given in [1]}, [2]}. There are many papers in literature based on island proposal, e.g., [3]}, [4]}, [5]}, [6]}, [7]}, [8]}, [9]}, [10]}, [11]}, [12]}, [13]}, [14]}, [15]}, [16]}, [17]}, [18]}, [19]}, [20]}, [21]}, [22]}, [23]}, [24]}, [25]}, [26]}, [27]} and in higher derivative theories of gravity [28]}, [29]}, [30]}, [31]}. Island in the context of de-Sitter spacetime have been studied in [32]}, [33]}, [34]}, [35]}, [36]}, [37]}, [38]}. Proposal to resolve the information paradox of an evaporating black hole from Matrix model has been given by authors in [39]}. There are many works on information paradox from doubly holographic setups, e.g., [40]}, [41]} and references therein.
